Revisit Phase Separation of the Two-Dimensional $t-J$ model by the Power-Lanczos Method

Details Revisit Phase Separation of the Two-Dimensional $t-J$ model by the Power-Lanczos Method Revisit Phase Separation of the Two-Dimensional $t-J$ model by the Power-Lanczos Method

2001-04-04

arxiv.org/abs/cond-mat/0104067v1

Physics

Condensed Matter

Strongly Correlated Electrons

14 pages, 14 figures

Scientific paper

10.1016/S0022-3697(01)00112-3

The power-Lanczos (PL) method is one kind of Green's function Monte-Carlo simulation, which is improved by Lanczos iterations. The ground state energies of strongly-correlated models can be evaluated by this method quite accurately. In this report, the boundary of phase separation (PS) of the two-dimensional $t-J$ model is investigated by the power-Lanczos method and Maxwell construction. The energies are compared with the results evaluated by other methods. Our conclusion is that there is no phase separation for $J/t \le 0.4$.

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